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FDA says 561 deaths tied to recalled Philips sleep apnea machines
(www.cbsnews.com)
This is a most excellent place for technology news and articles.
I'm not sure, but your comment seems to imply an assumption that the foam was designed to be external to the air path and is getting unintentionally sucked in? That's not the case, the foam is literally only inside an "air chamber" that the air directly travels through.